Found a link here helping another user in another thread, but reposting the basic info so the thread is current and complete technically speaking.
ActiveHome PRO is a 32 bit program. Windows has some built in magic to handle running 32 bit applications in a 64 bit operating system, but it involves having 2 copies of most system components. The 32 bit ones live in c:\windows\system32, the 64bit ones live in c:\windows\sysWOW64. They are NOT THE SAME, even though the files are named the same, are sometimes the same size, same version, and there is almost no way to tell the difference between them. For this reason you should NEVER copy files from c:\windows\system32 to c:\windows\sysWOW64 or the reverse.
The AHP installer does install the correct versions of these files normally, but if some kind of error is preventing it, you can also download installers from microsoft to create these files. I can't post the URL because of security restrictions but if you Google for "Microsoft Visual C++ 2010 Redistributable Package" you should find it easily. For X10 products you only need the Microsoft Visual C++ 2010 Redistributable Package (x86) version (Currently. We might make a 64 bit application someday). Installing the x64 version won't hurt anything though.